diff --git a/libs/ui/include/psemek/ui/positioner.hpp b/libs/ui/include/psemek/ui/positioner.hpp
index 7fce5944..6fb09112 100644
--- a/libs/ui/include/psemek/ui/positioner.hpp
+++ b/libs/ui/include/psemek/ui/positioner.hpp
@@ -26,7 +26,7 @@ namespace psemek::ui
 		struct shape const & shape() const override;
 		void reshape(geom::box<float, 2> const & box) override;
 
-		virtual void set_position(geom::point<float, 2> const & p, x_align x, y_align y);
+		virtual void set_position(geom::point<float, 2> const & p, x_align x, y_align y, bool clamp = true);
 
 		void draw(ui::painter &) const override {}
 
@@ -36,6 +36,7 @@ namespace psemek::ui
 		geom::point<float, 2> position_{0.f, 0.f};
 		x_align x_;
 		y_align y_;
+		bool clamp_;
 	};
 
 }
diff --git a/libs/ui/source/positioner.cpp b/libs/ui/source/positioner.cpp
index 0a8260d7..b77cde1e 100644
--- a/libs/ui/source/positioner.cpp
+++ b/libs/ui/source/positioner.cpp
@@ -51,16 +51,25 @@ namespace psemek::ui
 			break;
 		}
 
+		if (clamp_)
+		{
+			cbox[0] += std::max(0.f, box[0].min - cbox[0].min);
+			cbox[0] += std::min(0.f, box[0].max - cbox[0].max);
+			cbox[1] += std::max(0.f, box[1].min - cbox[1].min);
+			cbox[1] += std::min(0.f, box[1].max - cbox[1].max);
+		}
+
 		child_->reshape(cbox);
 	}
 
-	void positioner::set_position(geom::point<float, 2> const & p, x_align x, y_align y)
+	void positioner::set_position(geom::point<float, 2> const & p, x_align x, y_align y, bool clamp)
 	{
-		if (p != position_ || x_ != x || y_ != y)
+		if (p != position_ || x_ != x || y_ != y || clamp_ != clamp)
 		{
 			position_ = p;
 			x_ = x;
 			y_ = y;
+			clamp_ = clamp;
 
 			post_reshape();
 		}